Chip-breaker for molding and planing machines



(NoModel A. PREMO.

CHIP BRBAKER FOR MOLDING AND PLANING MACHINES.

Patented June 8, 1897.

ALBERT PREMO, OF SPRINGFIELD, MASSACHUSETTS.

CHlP-BREAKER FOR MOLDING AND PLANING MACHINES.

SPECEICATIGN formingpart of Letters :Patent No. 584,084, dated June 8, 189'?.

Application filed October 9, 1.896. Serial No. 608,838. INU model.)

T0 @ZZ iff/2,0711, t may concern.-

Be it knownthat I, ALBERT Prim/IO, a citizen of the United States, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Chip-Breakers for Molding and Planing Machines, of which the following is a specification.

This invention relates to improvements in that class of pressure-exerting chip-breakers for wood working, molding, and planing machines which comprise a series of springpressed sections which may individually yield to the unevenncss oi' the work or portions thereof passing thereunder so that the action of the machine becomes uniform.

The objects of the invention are to devise constructions and combinations of the parts comprised in the yielding section chipbreaker whereby the parts may be of simpliiied and cheapened construction, whereby they are capable of being assembled with the utmost ease, whereby a section or sections may be most easily removed or replaced, and whereby the arrangements for the application of the pressure-springs and the means for varying the pressure of the springs at pleasure are very simple, practical, and unusually desirable.

The invention consists in the particular specific construction and combinations of parts, all substantially as will hereinafter fully appear and be set forth in the claims.

Reference is to be had to the accompanying drawings, in which the present improvements in the construction of chipbreakers are illustrated in conjunction with so much of a wood molding or planing machine as renders inanifest the connection of the improved device therewith.

In the drawings, Figure 1 is a plan view. Fig. 2 is a vertical sectional view taken on line 2 2, Fig. 1. Fig. 3 is a cross-sectional view on the line 3 3, Fig. 1. Fig. e is a plan view of one of the chip-breaker sections.

Similar characters of reference indicate con responding parts in all the views.

A represents the knife-cylinder, B the bed thereunder, and C the chip-breaker, having their relative positions, as usual.

The chip-breaker comprises the two pivotally-supportcd arms a a and the crossbar l),

bolted thereto and having mounted thereupon the individual sections d d. lt is particularly to the construction and relative arrangement of the cross-bar l) and the sections d d that this invention relates, and particular description thereof will now follow. Said cross-bar l) has a long centrally-ranging rectangular mortise, the boundaries of which are indicated by 10, the same extending through it from top to bottom, the ends 12 12 of the bar being left solid through which, by the bolts 13, to securely confine the bar upon the ends of the aforesaid arms a d. Each of the individual sections CZ has the foot portion 14, which is downwardly divergent, with a curvature or inclination toward the knives, and the rectangular shank 15, narrower than the upper part of the foot-piece, whereby the shoulder 16 is produced at their junction. Each section has in its shank the slot 17, eX- tending through it from side to side. The shanks of the several sections d are entered in the long mortise or aperture of the crossbar sidewise in proximity the one to another, their slots all coming opposite one another, and a long rod f is passed through the solid end portions 12 of the bar, traversing the mortise and passing through the slots of the plurality of individual sections CZ, nutsA 1S screwing on the end of the rod, conning it firmly as one with the bar.

The stepped or shouldered part 1G of each section d has Within the top thereof a socket or sockets, preferably two, as indicated at 20, and above each of these sockets the bar l) is vertically drilled through from top to bottom, producing the sockets 22, in which the spiral springs g, preferably two for each section, may be dropped from the top, their lower ends resting in the said sockets 2O in the sections d. The said sockets 22 are screw-tapped at their upper parts, receiving therewithin the screw-plugs h h, which may be easily operated at the top edge of the bar to vary the compression of the springs. The rod engaging the several sections through the slots thereof prevents the latter from falling away from the bar or having an undue downward movement when there is no work passing under the chip-breaker, and the sides of the sections being formed fla-t renders each section a guide for the vertical movements of the ad- ICO joining one, and no specially-formed guiding device is necessary. The manufacturer can construct the novel parts mostly from iron castings and with very little machine-Work or finishing, and the user Will be enabled at very little trouble to himself to take out and replace sections whenever cause renders this advantageous.

I do not desire to be understood as claiinin g novelty, broadly, in a sectional chip-breaker having springs individually applied to the sections nor to means, broadly, for varying the compression of the springs, as these have been heretofore proposed in a Way; but I do claim particular constructions as above described and as hereinafter claimed, which involve invention and which render thc present improved sectional chip-breaker most acceptable and desirable, both from the standpoint of the maker and from that of the user; and therefore W'hat I claim, and desire to secure by Letters Patent, is-

l. In amolding or planing machine the coinbination, in the chip-breaker theieof,\vith the bar having the opening IO longitudinally thereof and having a series of vertical perforations at intervals through its portion near one edge, of the sections d each having a foot portion, and a shank of rectangular form, with a slioulderlG at the junction of the foot and shank," Which is overlaid by said perforated portion of the bar, springs let into said perforations and bearing against the said shouldered portions of the sections, and screwplugs, threading into said perforations and compressing the springs, substantially as iescribed.

2. Inamoldingorplaningniachine,tlie coinbination, in the chip-breaker thereof, with a bar having the longitudinal openin g lO therein, and having a series of vertical perforations 22 at intervals through its portion near one edge., of the series of sections d each having a foot portion, and a shank of rectangular form provided With the slot fand with the shoulder 16, at the junction of the foot and shank, which is overlaid by said perforated portion of the bar, the rod f having a supporting engagement `in the bar and passing through the slots of the several sections,

springs `let into said perforations and bearing ALBERT PREMO.

Vitn esses WM. S. BnLLoWs, E. C. DUMBLETON. 

